Soil moisture and plant residue addition interact in their effect on extracellular enzyme activity

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Responses of enzymatic activities within soil aggregates to 9-year nitrogen and water addition in a semi-arid grassland (2015, background): “Other studies have demonstrated that under improved water conditions, soil nutritional compounds were brought into soil solution activating microorganisms that up-regulated enzymatic production (Edwards et al., 2007; Geisseler et al., 2011) which is a likely mechanism to explain our findings.”
Effects of straw amendment and moisture on microbial communities in Chinese fluvo-aquic soil (2014, background): “Among these factors, soil moisture content is a critical factor in governing soil microbial activity, community composition, and function (Drenovsky et al. 2004; Geisseler et al. 2011; Brockett et al. 2012).”
Life in Dry Soils: Effects of Drought on Soil Microbial Communities and Processes (2018, background): “Extracellular enzymes are small and in intimate contact with substrate, and thus need thinner water films and smaller water-filled pores to function than do larger microbial cells; hence, enzyme activity might continue even as cellular metabolism declines with soil drying (Geisseler et al. 2011).”
Microbial enzymatic responses to drought and to nitrogen addition in a southern California grassland (2013, background): “Our results add to a body of conflicting literature on moisture effects on EEA in litter and soil (Criquet et al., 2002; Sardans and Penuelas, 2010; Bell and Henry, 2011; Geisseler et al., 2011).”